Many manufacturers will properly process the mold. In order to improve the performance of the mold, mold processing refers to the processing of forming and billet tools, but after the mold is processed, the performance of the mold will be reduced, and processing defects will also appear. So how to build mold processing defects Woolen cloth? Here are seven tips for reducing defects in Flourish Legend tooling!
1. Reasonable selection and dressing of grinding wheel
Reasonable selection and dressing of grinding wheels, their performance is hard and brittle, because the cutting force is small, the grinding heat is small, it is easy to produce new cutting edges, the hardness of the grinding wheel is medium soft and soft, that is, the grinding wheel with coarse grain size and low hardness is good. The self-excitation can reduce cutting heat. In the fine grinding process, it is very important to choose a suitable grinding wheel. In view of the high content of vanadium and molybdenum in the mold steel, GD single crystal corundum grinding wheel is more suitable. When processing high quenching hardness and hard alloy materials, diamond with organic binder is preferred Grinding wheel.
2. Thermal deformation treatment
In order to prevent thermal deformation of the workpiece, improve the cooling conditions during grinding, and play the three major functions of cooling, flushing and lubrication, use cooling lubricants reasonably, keep cooling and lubrication clean, and control the grinding heat within the allowable range.
3. Low temperature grinding
Because the quenching stress and network carbonization structure are easy to cause cracks in the workpiece under the action of grinding force, the quenching stress after heat treatment should be minimized, and the high-precision mold should be aged at low temperature after grinding. In order to eliminate the residual stress of grinding, to increase its toughness.
4. Reduce stress
In order to eliminate the grinding stress, the mold can be soaked in a salt bath, and then cooled in oil at 30°C to reduce the hardness and residual stress.
5. Consider the ambient temperature
For precision grinding of precision molds with dimensional tolerances, attention should be paid to the influence of ambient temperature, constant temperature grinding is required, and the influence of this factor should be fully considered in each finishing process.
6. Point solution grinding
During electrolytic grinding, the grinding wheel scrapes off the oxide film instead of CNC precision grinding metal, and electrolytic grinding is used to improve the manufacturing accuracy and surface quality of the mold.
7. Manual fine grinding
Reasonably choose the amount of grinding, and use a fine grinding method with a small radial feed, or even fine grinding.
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